import rangeJudgment from "@/plugins/map/tool/rangeJudgment";

const coordinateTransform = {
  //定义一些常量
  PI: 3.1415926535897932384626,
  x_PI: 3.14159265358979324 * 3000.0 / 180.0,
  a: 6378245.0,
  ee: 0.00669342162296594323,
  EARTHRADIUS: 6370996.81,
  MCBAND: [12890594.86, 8362377.87, 5591021, 3481989.83, 1678043.12, 0],
  LLBAND: [75, 60, 45, 30, 15, 0],
  MC2LL: [[1.410526172116255e-8, 0.00000898305509648872, -1.9939833816331, 200.9824383106796, -187.2403703815547, 91.6087516669843, -23.38765649603339, 2.57121317296198, -0.03801003308653, 17337981.2], [-7.435856389565537e-9, 0.000008983055097726239, -0.78625201886289, 96.32687599759846, -1.85204757529826, -59.36935905485877, 47.40033549296737, -16.50741931063887, 2.28786674699375, 10260144.86], [-3.030883460898826e-8, 0.00000898305509983578, 0.30071316287616, 59.74293618442277, 7.357984074871, -25.38371002664745, 13.45380521110908, -3.29883767235584, 0.32710905363475, 6856817.37], [-1.981981304930552e-8, 0.000008983055099779535, 0.03278182852591, 40.31678527705744, 0.65659298677277, -4.44255534477492, 0.85341911805263, 0.12923347998204, -0.04625736007561, 4482777.06], [3.09191371068437e-9, 0.000008983055096812155, 0.00006995724062, 23.10934304144901, -0.00023663490511, -0.6321817810242, -0.00663494467273, 0.03430082397953, -0.00466043876332, 2555164.4], [2.890871144776878e-9, 0.000008983055095805407, -3.068298e-8, 7.47137025468032, -0.00000353937994, -0.02145144861037, -0.00001234426596, 0.00010322952773, -0.00000323890364, 826088.5]],
  LL2MC: [[-0.0015702102444, 111320.7020616939, 1704480524535203, -10338987376042340, 26112667856603880, -35149669176653700, 26595700718403920, -10725012454188240, 1800819912950474, 82.5], [0.0008277824516172526, 111320.7020463578, 647795574.6671607, -4082003173.641316, 10774905663.51142, -15171875531.51559, 12053065338.62167, -5124939663.577472, 913311935.9512032, 67.5], [0.00337398766765, 111320.7020202162, 4481351.045890365, -23393751.19931662, 79682215.47186455, -115964993.2797253, 97236711.15602145, -43661946.33752821, 8477230.501135234, 52.5], [0.00220636496208, 111320.7020209128, 51751.86112841131, 3796837.749470245, 992013.7397791013, -1221952.21711287, 1340652.697009075, -620943.6990984312, 144416.9293806241, 37.5], [-0.0003441963504368392, 111320.7020576856, 278.2353980772752, 2485758.690035394, 6070.750963243378, 54821.18345352118, 9540.606633304236, -2710.55326746645, 1405.483844121726, 22.5], [-0.0003218135878613132, 111320.7020701615, 0.00369383431289, 823725.6402795718, 0.46104986909093, 2351.343141331292, 1.58060784298199, 8.77738589078284, 0.37238884252424, 7.45]],

  transformLat(lng, lat) {
    let ret = -100.0 + 2.0 * lng + 3.0 * lat + 0.2 * lat * lat + 0.1 * lng * lat + 0.2 * Math.sqrt(Math.abs(lng));
    ret += (20.0 * Math.sin(6.0 * lng * this.PI) + 20.0 * Math.sin(2.0 * lng * this.PI)) * 2.0 / 3.0;
    ret += (20.0 * Math.sin(lat * this.PI) + 40.0 * Math.sin(lat / 3.0 * this.PI)) * 2.0 / 3.0;
    ret += (160.0 * Math.sin(lat / 12.0 * this.PI) + 320 * Math.sin(lat * this.PI / 30.0)) * 2.0 / 3.0;
    return ret
  },

  transformLng(lng, lat) {
    let ret = 300.0 + lng + 2.0 * lat + 0.1 * lng * lng + 0.1 * lng * lat + 0.1 * Math.sqrt(Math.abs(lng));
    ret += (20.0 * Math.sin(6.0 * lng * this.PI) + 20.0 * Math.sin(2.0 * lng * this.PI)) * 2.0 / 3.0;
    ret += (20.0 * Math.sin(lng * this.PI) + 40.0 * Math.sin(lng / 3.0 * this.PI)) * 2.0 / 3.0;
    ret += (150.0 * Math.sin(lng / 12.0 * this.PI) + 300.0 * Math.sin(lng / 30.0 * this.PI)) * 2.0 / 3.0;
    return ret
  },
  getLoop(lng, min, max) {
    while (lng > max) {
      lng -= max - min;
    }
    while (lng < min) {
      lng += max - min;
    }
    return lng;
  },

  getRange(lat, min, max) {
    if (min != null) {
      lat = Math.max(lat, min);
    }
    if (max != null) {
      lat = Math.min(lat, max);
    }
    return lat;
  },
  /**
   * WGS转百度经纬
   * @param lon
   * @param lat
   * @returns {*[]}
   */
  WGS2BD(lon, lat) {
    //先由经纬转火星
    let coordinate = this.WGS2GCJ(lon, lat);
    //再将火星转百度
    coordinate = this.GCJ2BD(coordinate[0], coordinate[1]);
    return coordinate;
  },
  /**
   * WGS84转GCj02
   * @param lon
   * @param lat
   * @returns {*[]}
   */
  WGS2GCJ(lon, lat) {
    if (rangeJudgment.isInsideChina(lon, lat)) {
      return [lon, lat]
    } else {
      let dLat = this.transformLat(lon - 105.0, lat - 35.0);
      let dLon = this.transformLng(lon - 105.0, lat - 35.0);
      let radLat = lat / 180.0 * this.PI;
      let magic = Math.sin(radLat);
      magic = 1 - this.ee * magic * magic;
      let sqrtMagic = Math.sqrt(magic);
      dLat = (dLat * 180.0) / ((this.a * (1 - this.ee)) / (magic * sqrtMagic) * this.PI);
      dLon = (dLon * 180.0) / (this.a / sqrtMagic * Math.cos(radLat) * this.PI);
      let mgLat = lat + dLat;
      let mgLon = lon + dLon;
      return [mgLon, mgLat];
    }
  },
  /**
   * 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换
   * 即谷歌、高德 转 百度
   * @param lon
   * @param lat
   * @returns {*[]}
   */
  GCJ2BD(lon, lat) {
    let z = Math.sqrt(lon * lon + lat * lat) + 0.00002 * Math.sin(lat * this.x_PI);
    let theta = Math.atan2(lat, lon) + 0.000003 * Math.cos(lon * this.x_PI);
    let bd_lon = z * Math.cos(theta) + 0.0065;
    let bd_lat = z * Math.sin(theta) + 0.006;
    return [bd_lon, bd_lat];
  },
  /**
   * 百度经纬度转百度墨卡托
   * @param lng
   * @param lat
   * @returns {*[]}
   */
  BD_WGS2MKT(lng, lat) {
    let cF = null;
    lng = this.getLoop(lng, -180, 180);
    lat = this.getRange(lat, -74, 74);
    for (let i = 0; i < this.LLBAND.length; i++) {
      if (lat >= this.LLBAND[i]) {
        cF = this.LL2MC[i];
        break;
      }
    }
    if (cF != null) {
      for (let i = this.LLBAND.length - 1; i >= 0; i--) {
        if (lat <= -this.LLBAND[i]) {
          cF = this.LL2MC[i];
          break;
        }
      }
    }
    lng = cF[0] + cF[1] * Math.abs(lng);
    let cC = Math.abs(lat) / cF[9];
    lat = cF[2] + cF[3] * cC + cF[4] * cC * cC + cF[5] * cC * cC * cC + cF[6] * cC * cC * cC * cC + cF[7] * cC * cC * cC * cC * cC + cF[8] * cC * cC * cC * cC * cC * cC;
    lng *= (lng < 0 ? -1 : 1);
    lat *= (lat < 0 ? -1 : 1);
    return [lng, lat];
  },
  /**
   * 百度经纬度转百度墨卡托（南半球、西半球均适用）
   * @param lng
   * @param lat
   * @returns {*[]}
   */
  BD_WGS2MKT_NORTH(lng, lat) {
    let isNorth = false
    let isWest = false
    if(lat<0){
      lat=Math.abs(lat)
      isNorth = true
    }
    if(lng<0){
      lng=Math.abs(lng)
      isWest = true
    }
    let cF = null;
    lng = this.getLoop(lng, -180, 180);
    lat = this.getRange(lat, -74, 74);
    for (let i = 0; i < this.LLBAND.length; i++) {
      if (lat >= this.LLBAND[i]) {
        cF = this.LL2MC[i];
        break;
      }
    }
    if (cF != null) {
      for (let i = this.LLBAND.length - 1; i >= 0; i--) {
        if (lat <= -this.LLBAND[i]) {
          cF = this.LL2MC[i];
          break;
        }
      }
    } else {
      console.dir('未转成功',[lng, lat])
      return [lng, lat];
    }
    lng = cF[0] + cF[1] * Math.abs(lng);
    let cC = Math.abs(lat) / cF[9];
    lat = cF[2] + cF[3] * cC + cF[4] * cC * cC + cF[5] * cC * cC * cC + cF[6] * cC * cC * cC * cC + cF[7] * cC * cC * cC * cC * cC + cF[8] * cC * cC * cC * cC * cC * cC;
    lng *= (lng < 0 ? -1 : 1);
    lat *= (lat < 0 ? -1 : 1);
    if(isNorth){
      lat = -lat;
    }
    if(isWest){
      lng = -lng;
    }
    return [lng, lat];
  }
}

export default coordinateTransform;
